to 'syntax-error', which is in r7rs.
	* standard/syntax_error.java: updated.

	* syntax.scm: Update for '%syntax-error' -> 'syntax-error' renaming.
	* std_syntax.scm: Likewise.

	* errors4.scm: New test from r7rs of 'syntax-error'.
	* Makefile.am: Update accordingly.